Abstract: A work assist device includes a body coordinates information acquiring unit, a body orientation information acquiring unit, a work member position information acquiring unit, a specific part coordinates computing unit, a placement information receiving unit, a distance information input unit, a construction surface computing unit, a storage unit, and a construction information output unit. The specific part coordinates computing unit can compute absolute coordinates of a specific part of a work member, from acquired information from each acquiring unit. The construction surface computing unit determines an equation for a construction surface in an absolute coordinate system at a work site, from absolute coordinates of three ground reference points at which the specific part is placed in order and three pieces of distance information indicating a distance from the ground reference points to the construction surface.

Abstract: A method for producing an additively manufactured object includes melting and solidifying a filler metal to form weld beads and depositing the weld beads adjoining each other, thereby forming a weld-bead layer, and repeatedly depositing a next weld-bead layer on the formed weld-bead layer to conduct additive manufacturing. The method includes a bead formation step of forming a new weld bead so as to fill a recess formed by at least three of the already formed weld beads, in a cross-section perpendicular to a longitudinal direction of the weld beads.

Abstract: A reduced iron production method includes: a reduction-step of producing reduced iron by heating an agglomerate containing iron oxide and carbonaceous reducing agent to reduce the iron oxide and solidifying a product produced by melting the reduced iron; a first-magnetic-separation-step of separating, among granular metallic iron, first slag, and second slag containing more fine-granular metallic iron than the first slag that are contained in the product, at least the granular metallic iron from the first slag by use of a first magnetic separator to separate first slag containing substance and a granular metallic iron containing substance from each other; a second-magnetic-separation-step of separating the second slag from the first slag containing substance or the granular metallic iron containing substance by use of a second magnetic separator having attraction force different from attraction force of the first magnetic separator; and a crushing-step of crushing the second slag.

Abstract: In a heat exchanger of the present invention, a release port for, in a case where a fluid flows into an internal space, releasing the fluid to an exterior is provided in a protection unit main body of each of protection units arranged on both outer sides of a heat exchange unit, and a protection unit fin plate of the protection unit has such strength that a coupling state between an outer surface of an outermost-layer partition plate and a bonding plate of the protection unit main body facing the outer surface is maintained even in a case where an inner pressure set as a design pressure for a part of the heat exchange unit constituting an outermost-layer flow passage adjacent to the protection unit is applied to the internal space of the protection unit main body of the protection unit.

Abstract: An object of the present disclosure is to provide a method for manufacturing an aluminum alloy plastically-processed article, capable of preventing a burning crack from occurring due to processing heat generated during plasticity processing while maintaining a solution-treatment temperature of an aluminum alloy material for ensuring a mechanical strength thereof. A method for manufacturing an aluminum alloy plastically-processed article, includes a step of performing a solution treatment for an aluminum alloy material by heating and maintaining the aluminum alloy material at a solution-treatment temperature, a step of performing plasticity processing for the aluminum alloy material subjected to the solution treatment, and steps of cooling the plastically-processed aluminum alloy material at a time at which the step of the plasticity processing is completed, and aging the cooled aluminum alloy material.

Abstract: According to a certain viewpoint of the present invention, there is provided a blast furnace operation method comprising blowing a high-concentration hydrogen-containing gas containing 80 mol % or more of hydrogen gas from a tuyere under: a condition in which a blowing temperature of the high-concentration hydrogen-containing gas is room temperature or higher and 300° C. or lower and a gas volume of the hydrogen gas in the high-concentration hydrogen-containing gas is 200 Nm3/t or more and 500 Nm3/t or less; a condition in which the blowing temperature of the high-concentration hydrogen-containing gas is higher than 300° C. and 600° C. or lower and the gas volume of the hydrogen gas in the high-concentration hydrogen-containing gas is 145 Nm3/t or more; a condition in which the blowing temperature of the high-concentration hydrogen-containing gas is higher than 600° C. and 900° C. or lower and the gas volume of the high-concentration hydrogen-containing gas is 125 Nm3/t or more, or the like.

Abstract: Provided are a coil unit for electromagnetic forming capable of stably processing a plurality of portions in the longitudinal direction of a tubular member while preventing the contact between the tubular member and a conductor or the contact between the conductors even when the tubular member is long, and a method for producing a formed article using the coil unit. The coil unit for electromagnetic forming includes: a shaft core member made of a resin; a conductor having a wound portion, which is wound around the shaft core member, and a pair of conductor extension portions; an insulating support; and a resin coating layer formed on the outer peripheral surface of the wound portion. In the insulating support, a conductor holding portion for holding the conductor extension portions apart from each other is formed along the longitudinal direction.

Abstract: The apparatus includes an upper mold and a lower mold that sandwich the metal member and the resin material, and a drive unit that vertically moves an elastic member attached to a molding surface of the upper mold and at least one of the upper mold and the lower mold. A cavity for arranging the resin material is provided by the upper mold 110 and the lower mold. The elastic member is arranged so as to seal the resin material in the cavity.

Abstract: A method for producing a molten steel may provide: solid-state direct reduced iron containing 3.0% by mass or more of SiO2 and Al2O3 in total and 1.0% by mass or more of carbon, a ratio of a metallic iron to a total iron content contained in the solid-state direct reduced iron being 90% by mass or more, and an excess carbon content Cx to the carbon contained in the solid-state direct reduced iron being 0.2% by mass or more. Such methods may include: a slag separation including heating the solid-state direct reduced iron and melting it in an electric furnace without introducing oxygen to separate into a molten steel and a slag, and continuously discharging the slag, and a decarburization including blowing, in the electric furnace, a total amount of oxygen introduced into the electric furnace to the molten steel to decarburize the molten steel after the slag separation.

Abstract: A mold is for press molding a metal plate and a resin material to produce a metal-resin composite. The mold includes an upper mold and a lower mold that sandwich the metal plate and the resin material. A cavity for arranging the resin material is provided by the upper mold and the lower mold. The upper mold has a recess into which the resin material leaking from the cavity is caused to flow.

Abstract: A mold for producing a metal-resin composite by press-forming a metal member and integrally molding the metal member that is press-formed and a resin material includes an upper mold and a lower mold that sandwich the metal member and the resin material. The upper mold includes a first press surface for press-forming the metal member and a second press surface for integrally molding the metal member and the resin material. A distance between the first press surface and the lower mold is shorter than a distance between the second press surface and the lower mold.

Abstract: An additively manufactured object formed by depositing weld bead layers, each of the weld bead layers being obtained by melting and solidifying a filler metal made of a mild steel, the additively manufactured object includes a plurality of the weld bead layers having a ferrite phase with an average grain diameter of 11 ?m or less in a part except for a surface oxide film.

Abstract: In a method for producing a molten steel according to one aspect of the present invention, the solid-state direct reduced iron contains 3.0% by mass or more of SiO2 and Al2O3 in total and 1.0% by mass or more of carbon. A ratio of a metallic iron to the total iron content contained in the solid-state direct reduced iron is 90% by mass or more, and an excess carbon content Cx is 0.2% by mass or more to the carbons contained in the solid-state direct reduced iron. The method includes a step in a first furnace of melting 40 to 100% by mass of the solid-state direct reduced iron, and separating a molten pig iron having a carbon content of 2.0 to 5.0% by mass and a temperature of 1350 to 1550° C. and a slag having a basicity of 1.0 to 1.4 and a step in a second furnace of melting a remainder of the solid reduced iron together with the molten pig iron separated in the first furnace and blowing oxygen onto the molten material to decarburize into a molten steel.

Abstract: A heat exchanger includes a heat exchanger body having a plurality of layer portions each having a plurality of flow paths, and having a configuration in which adjacent layer portions are joined to each other, an inflow header being configured that a fluid is introduced into the inflow header to flow into the plurality of flow paths, an outflow header being configured that a fluid flowing through the plurality of flow paths merges, a cover portion covering all joint portions of the adjacent layer portions or all joint portions of components of layer portions, the joint portions exposed on an outer surface of the heat exchanger body at a portion other than a portion where the inflow header and the outflow header are disposed, and a lead-out portion connected to the cover portion and forming an internal flow path communicating with a space between the cover portion and the heat exchanger body. The lead-out portion is configured to emit a fluid to a predetermined region set in advance.

Abstract: When a T1-tempered aluminum alloy extrusion is subjected to plastic working and thus formed into a product, crack occurrence is prevented during plastic working, and tensile residual stress of the product is reduced to improve stress corrosion cracking resistance. A T1-tempered 7000-series aluminum alloy extrusion is heated to a temperature range of 150° C. or higher, and then subjected to plastic working within the temperature range, and then cooled, and then subjected to artificial temper aging. An integral value (F140) of (T(t)?140)2 is controlled to 5×105 (° C.2·s) or less in a section of t1?t?t2, where t is time (s) from heating start, T(t) is temperature (° C.) of the extrusion at time t, t1 is time before the extrusion reaches 140° C. in a heating step, and t2 is time before the extrusion reaches 140° C. again in a cooling step.

Abstract: A thin film transistor includes at least a gate electrode, a gate insulating film, an oxide semiconductor layer, source/drain electrodes, and at least one layer of a passivation film on a substrate. Metal elements constituting the oxide semiconductor layer include In, Ga, Zn, and Sn. Respective ratios of the metal elements to a total (In+Ga+Zn+Sn) of the metal elements in the oxide semiconductor layer satisfy: In: 30 atom % or more and 45 atom % or less, Ga: 5 atom % or more and less than 20 atom %, Zn: 30 atom % or more and 60 atom % or less, and Sn: 4.0 atom % or more and less than 9.0 atom %.

Abstract: A welding system includes a welding torch that welds a workpiece by using a wire, a suction device that sucks shielding gas, and a sucked shielding gas supply path for allowing the sucked shielding gas to flow, wherein the welding torch includes a contact chip that guides the wire, a shielding gas supply nozzle that supplies the shielding gas to a weld zone, and a suction nozzle that surrounds a periphery of the wire protruding from the contact chip, and is opened toward a tip of the wire to suck the shielding gas.

Abstract: A hydrogen permeability testing device can measure hydrogen amount(s) entering a metal material by electrochemical hydrogen permeation. The device may include: a metal specimen having a hydrogen entry face through which hydrogen enters, a hydrogen detection face on which the entered hydrogen is detected, and a metal plating formed on the hydrogen detection face to detect the entered hydrogen; a reference and counter electrode for making an electrochemical reaction progress; an electrolytic vessel provided on a hydrogen detection face side, housing the reference and counter electrode, and containing an aqueous sodium silicate solution having a freezing point of ?0° C. and capable of suppressing residual current to ?10 nA/cm2 when an electric potential of the hydrogen detection face is ?1 to 1 V relative to the reference electrode; and a measurement unit which measures the amount of hydrogen based on a current value resulting from the electrochemical reaction.

Abstract: A flux-cored wire comprising a flux which is a core and a hoop which is an outer skin or sheath is described. The flux includes a strong deoxidizing metal element containing Mg and Al, and a fluoride powder. At least 60 mass % of a strong deoxidizing metal powder related to the strong deoxidizing metal element has a grain size of at most 150 ?m. At least 60 mass % of the fluoride powder has a grain size of at most 75 ?m. The flux is present at a concentration of 10-30 mass % relative to a total mass of the flux-cored wire. The flux-cored wire also requires a specific composition of elements.

Abstract: In a channel structure of a channel device, first confluence channels of a plurality of first channels include a plurality of first confluence channels arranged along a second board front surface, first confluence portions of the first channels in each of first boards are configured of a plurality of first confluence portion through-holes that penetrate the first board, and second first-liquid introduction channel and second second-liquid introduction channels of a plurality of second channels are arranged along the second board front surface and are located in an area that is deviated from the first confluence channels in a view in a direction along a stacking direction of the first board and the second board.